You should really rebias with every power tube change. Unfortunately I don't thing the DRRI has a bias pot so you'll have to take it to a tech and get one installed. Though I could be wrong on that.ajcoholic said:Thanks very much. Just placed my order and hopefully they will get here early next week.
Does anyone know if I just pull the old tubes and install the new ones - or does my amp need a biasing?
I havent changed tubes before. But I am hearing all kinds of scratchiness and periodic loss of signal (already made sure all connections are good, changed the speaker cable/plug, etc.
Hope the new tubes fix the problem. I did notice starting a few months ago before the noise started, after I would turn on the amp and play, the volume would drop and then come back and it would be ok. but its getting worse. From all that I have read on the topic it sounds like the tube(s) so they are all getting replaced.
Good to know, thanks! I normally wouldnt be in such a hurry but my band has a paying gig this Friday and Saturday night at a local bar and I really want my DRRI for my clean stuff.Yerffej said:if you send the tube store your old tubes before buying new ones, they can match them exactly making rebiasing unneccessary. for next time